In the great Calamity, the Lawbringer Tyr knew that to defeat the betrayer gods he had to judge the souls of the fallen ones.  This spell lets you judge the soul of your foes. When casting you peer into there soul and place it on the scales of justice.  If the scales weigh in there favor the soul is saved. If the scales don't weigh in their favor they are cast into the ethos. 

"May the Scales weigh in your favor" Tyr, the Lawbringer

If this is the killing blow roll a d6 if it is a three or lower the scales judged them evil then the body is absolved and turned to ash. If 4 or higher the scales are in there favor and the soul is cleansed and the body is maintained. The DM can dismiss this if the enemy is truly evil and is beyond saving. DC= 8+ Spellcasting Mod